\begin{{equation}}
R_0 =
\begin{{bmatrix}}
    {param_price_constant} \hspace{{3pt}} ({error_price_constant}) \\
    {param_low_constant}  \hspace{{3pt}} ({error_low_constant}) \\
    {param_mid_constant}  \hspace{{3pt}} ({error_mid_constant}) \\
    {param_high_constant}  \hspace{{3pt}} ({error_high_constant}) \\
\end{{bmatrix}},
\hspace{{11pt}} R_1 =
\begin{{bmatrix}}
    {param_price_price} \hspace{{3pt}} ({error_price_price})
    & 0
    & 0
    & 0
    \\
    {param_low_price} \hspace{{3pt}} ({error_low_price})
    & {param_low_low}\hspace{{3pt}} ({error_low_low})
    & {param_low_mid} \hspace{{3pt}} ({error_low_mid})
    & {param_low_high} \hspace{{3pt}} ({error_low_high})
    \\
    {param_mid_price} \hspace{{3pt}} ({error_mid_price})
    & {param_mid_low}\hspace{{3pt}} ({error_mid_low})
    & {param_mid_mid} \hspace{{3pt}} ({error_mid_mid})
    & {param_mid_high} \hspace{{3pt}} ({error_mid_high})
    \\
    {param_high_price} \hspace{{3pt}} ({error_high_price})
    & {param_high_low}\hspace{{3pt}} ({error_high_low})
    & {param_high_mid} \hspace{{3pt}} ({error_high_mid})
    & {param_high_high} \hspace{{3pt}} ({error_high_high})
\end{{bmatrix}}
\end{{equation}}